GMSK – RAYmaps

January 13, 2020June 3, 2022BER Performance, Modulation

Orthogonal Minimum Shift Keying (OMSK)

Some Background Before we delve deep into Minimum Shift Keying (MSK) and its performance in presence of co-channel interference the reader is advised to look at the following posts. Post 1 – MSK BER performance in AWGN and flat fading environment when viewed as extension of BPSK Post 2 – MSK Power Spectral Density and its BER performance in AWGN when viewed as a CPM Post 3 – MSK BER Performance in AWGN and flat fading environment when viewed as a CPM Co-channel interference is a phenomenon widely encountered in wireless communication systems and the main reason for that is […]

December 18, 2019June 4, 2022BER Performance, Modulation

MSK – A Continuous Phase Modulation (CPM)

Some Background on MSK I – In the previous post we presented the mathematical model and code for BER calculation of a popular modulation scheme called MSK. However in the code we shared, we only considered one sample per symbol, which makes MSK look like BPSK. While BPSK symbols fall on the real axis, MSK symbols alternate between real and imaginary axes, progressing by π/2 phase during each symbol period. MSK signal thus has memory and this can help in demodulation using advanced techniques such as Viterbi Algorithm.

December 10, 2019June 4, 2022BER Performance, Modulation

Minimum Shift Keying Bit Error Rate in AWGN

Minimum Shift Keying (MSK) is a type of Continuous Phase Modulation (CPM) that has been used in many wireless communication systems. To be more precise it is Continuous Phase Frequency Shift Keying (CPFSK) with two frequencies f1 and f2.